Coherent population trapping and the effect of laser phase fluctuations

Jian Wang, Xiangming Hu

We examine the effects of cross correlated phase fluctuations on the coherent population trapping (CPT) induced by a pair of phase-modulated fields with equal modulation frequencies in a three-level Λ system. The maximal coherence of -0.5, which appears when CPT occurs for equal modulation indices, is preserved in the presence of the critically cross-correlated fluctuations. Unexpectedly, the non-maximal coherence, which is established when CPT is obtained for different modulation indices, is significantly enhanced due to the critically cross-correlated fluctuations.

Wolfgang Maichen, Rainer Gaggl, Eugeny Korsunsky +1 more

V. S. Zholnerov, A. Besedina, Georgy A. Kazakov

We report the results of mathematical modeling the frequency stability for three types of rubidium gas cell frequency standards : with continuous and pulse laser pumping and with coherent population trapping (CPT). A critical point for using laser pumping in RFS which defines essentially the frequency stability is the influence of laser emission's frequency fluctuations. The effect of these fluctuations on frequency stability of RFS variants' considered is analyzed. Based on studies performed, the achievable stability for these RFS variants are compared.

Wolfgang Maichen, Rainer Gaggl, Eugeny Korsunsky +1 more

Boris G. Matisov, I. E. Mazets

Gao‐xiang Li, Jin-sheng Peng, Peng Zhou

We have studied the effects of laser phases on photoionization rate and atomic coherent population trapping in a two-channel ionization system. A dressed-state analysis is given to explain the appearance of phase-dependent atomic coherent population trapping.